James gbesham



(ModeL) J. GRESHAM.

\ v INJECTOR.

\ No. 319,481 Patented June 9, 1885.

7 Nil Jig mu QR Way 5% I STATES 1 FFIQEQ INJECTO R.

SPECIFICATION forming part of Letters Patent No. 319,l81,'dated June 9, 1885.

Application filed October 6, 1884. (ModeL) Patented in England May 2, 1884, No. 7,110, and July 23, 1984, No. 10,475, and in France J line 14, 1884, No. 162,753.

To all whom it may concern:

Be it known that I, J AMES GRESHAM, a subject of the Queen of England, residing at Manchester, England, have invented certain new and useful Improvements in Injectors, (for which I have obtained Letters Patent in France, No. 162,753, under date of June 14, 1 884:,and have made applications for Patents in England, Nos. 7,116 and 10,475, under dates of May 2, 1884:, and July 23, 1884;) and I do hereby declare the following to be a full, clear, and exact description of the invention.

This invention relates to improvements in that class of injectors which I have fully described in an application for Patent of the United States of even date with this; and my improvements consist in that, instead of employing a sliding compound combining and discharging cone, I employ separate combining and discharging cones, the latter alone being arranged to slide in its bearings, and in that the movements of the dischargingmone will close or partially close the overflow-ports.

The objects of this invention are the same as those set forth in my application for patent above referred to, and need only be briefly mentionednamely, to obtain an injector that will start automatically; that will lift or raise its supply of water from a greater depth, and that will require no packing to produce a tight joint between the movable discharging-cone and its bearings.

In the accompanying drawings, Figures 1 and 2 are longitudinal sections of an injector embodying my improvements, the latter figure illustrating a slight modification, and Figs. 3 and 4c are sections on lines was and gm of Figs. 1 and 2, respectively.

Referring to Fig. 1, A indicates the injectorcasing, provided with steam inlet or branch I), water-branch'b, overflow-branch b and delivery or discharge branch b 0 is the steamcone, seated in the axial passage of easing A at the steanrinlet b. On the inner periphery of the casing A are formed projecting annular bearings a and a, in which fit corresponding bearings, d and d, formed on the outer periphery of an interior casing, D, whereby chambers c c are formed between said casing A and the steam-cone and the inner casing, D, on the one hand, and between the two casings on the other hand. The discharge chamber 0" is formed by a contracted portion of the interior casing, D, and the casing A, and said chamber communicates with the discharge or delivery branch I), while the chambers c" c communicate, respectively, with the overflow-branch b and the water-branch b. The interior casing, D, is formed in two sections, D Dtscrewed together at -d", andusaid easing at its rear end is screwed into the rear end of easing A, and has a flange, d, and a flat or bolt head, d", for the application of a wrench, whereby said casing D may be screwed to or unscrewed from casing A. The axial passage of the two-part casing terminates in an enlarged chamber, D, that communicates by ports 1) with the chamber c, and through the latterwith the delivery-branch b The axial passage of the section D of easing D is contractedto receive the discharging-cone which cone has at its forward end an annular flange O, and is adapted to slide in its bearings and in an overflow-chamber, 0, formed by the enlarged axial passage at the rear end of section D and the front end of section D The chamber 0 is in communication with the chamber a", and through the latter with overflow-branch b by means of overflow-ports p, and at its forward end the section D of easing D is constructed to form a lifting-cone, G.

Between the lifting-cone G of section D of easing D, and the chamber 0 at the rear end of said casing islocated the combining-cone C". The axial passage of cone 0 at its rear end is made flaring to form an abutment or seat for the outer end of the combining-cone G and consequently a space or passage, p between the two cones. The combiningcone O has ribswfthat project from its periphery and fit the enlarged axial passage of section D of easing D, said ribs forming passages or chambers, 0 in communication with the overflow-passage p at one end and at the other with the overflow-chamber c, and through the ports 1) thereof with chamber 0 and the over- IOO under the reactive pressure of the combined jet of steam and water the flange thereof will cover the overflow-ports 10, thereby closing all the overflow-passages, since no fluid can pass from passage p and chamber or passages c formed by the ribs 1 of the combining-cone (7 to the overflow-chamber 0. When steam is admitted, we will suppose, after the injector had been at work and stopped, the discharging-cone 0 being in contact with the end of the combining-cone and its flange 0 covering the overflow-ports 19 if steam is again admitted the pressure of the jet will move the discharging-cone rearwardly; the portsp will be uncovered, and more or less steam will pass by p 0* and the passage of the combining-cone to c c and the overflowbranch; a partial vacuum will be formed in the injector; the water will be lifted and combine with the steam, and more or less of both will pass out to the overflow-branch, as above stated, until the jet is established and the combined steam and water pass through the discharging-cone. the jet will then cause the discharging-cone to move forwardly to close or partially close the overflow-ports 19, according to the velocity and reactive pressure of the combined jet of steam and-water. Any temporary leakage of the fluids that may take place between the discharging-cone O" and its bearings will be drawn in at the overflowports. By unscrewing the casing D from casing A all the parts connected therewith may be withdrawn from casing A, as will be readily understood, whenever such removal becomes desirable or necessary from any cause, and by unscrewing section D from section D the combining and discharging cones may be removed from casing D.

111 order that any slight leakage may be drawn in when the discharging cone covers the overflow-ports p, a port, 1), is or may be formed near the outer end of the dischargingcone, as shown in dotted lines, which drawing in of leakage is possible since the flange 1(3) does not completely fill the overflow-cham- The combining'cone C is held against displacementin the casing by means of a binding-screw, s penetrating into one of the ribs 7 of said cone.

In Figs. 3 and 4. I have shown a modification in the arrangement of the lifting, combining, and discharging cone, substantially like that shown in Fig. 2 in my said application for patent above referred to, the casing D being here dispensed with and a sleeve, S, employed in its stead, held against longitudinal movement by a screw, 8, that penetrates into an annular groove formed in the periphery of said sleeve. The combined combining and lifting cones C 0 here, also, are secured in position by a screw, 8, that penetrates into an annular groove formed in the periphery of the lifting-cone, and in this arrangement the internal parts of the injector can likewise not be removed, except by uncoupling the injector- The reactive pressure of case from its steam and delivery connections, the delivery branch having its outlet-orifice on the plane of the axial passage of said internal parts. Here, also, the sleeve S may be dispensed with by reducing the diameter of the axial passage at the rear end of the casing A, which then serves as a bearing in which the discharging-cone slides. In such a construction the cones are introduced through the steam-inlet, as will be readily understood. When the discharging-cone is moved forward under the reactive pressure of the combined jet of water and steam, the overflow-passage p is closed by the contactof the flange O" of cone 0 with the end of the chamber of the lifting-cone O, that contains the combiningcone. Any temporary leakage is or may be drawn in by a small port, 19 formed at or near the flanged end of the discharging-cone, as shown in dotted lines, Fig. 2.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In an injector, the combination,with the injector-casing and a combined lifting and combining cone, of a discharging cone arranged to slide in said casing away from the end of the combining-cone under the pressure of the entering jet of steam, and in a direction toward said portion of the cone under the reactive pressure of the combined jet of steam and'water, tovary or close the overflow-passage between the discharging-cone and the end of the portion 0 of the lifting and combining cone, for the purpose specified.

2. In an injector, the combination,with the injector-casing, the steam-cone O, and a combined lifting and combining cone, of a discharging-cone arranged to slide away from the end of said combiningcone under the pressure of the entering jet of steam, and toward said end under the reactive pressure of the combined jet of steam and water, to vary or close the overflow-passage between the two, for the purpose specified.

3. In an injector, the combinatiomwith the injector-casing, and a liftingcone and combining-cone having an overflow-passage between them, of a discharging-cone and an overflowpassage between the latter and the combining- IIO cone, said discharging-cone being arranged to automatically open or close both the overflowpassages, as described, for the purpose specified.

4. In an injector, the combination, with the injector-casing, of an internal casing detachably connected therewith, in one end of which internal casing is formed a lifting and combining cone, in combination with a dischargingcone arranged to slide freely 'in a bearing formed in the opposite end of said-internal casing, as described, for the purpose specified. 5. In an injector, the combination, with the injector-casing, of an internal casing, one end of which constitutes the lifting-cone, and in discharging cones, overflow-passages arranged which casing are arranged the combining and r between each two of said cones, the discharging-eone operating to automatically close or open all the overflow-passages, for the purpose specified.

6. In an injector, the combination, with the injector-casing of a lifting-cone, a combiningcone, overflow-passages between the two and around the lattercone, a discharging-cone, and overflow-passage between the latter cone and the combining-cone, said combining-cone operating to automatically open or close all the overflow-passages, as described, for the -purpose specified.

7. In an injector, an outer casing, an inner casing detachably connected with the outer casing, one end of which inner casing constitutes the lifting-cone, the opposite end forming a delivery-chamber, a combining-cone arranged in said inner casing, overflow-passages between the two cones and around and in rear of the combining-cone, and a discharging-cone arranged to slide endwise in said inner casing, to automatically openor close all the overflowpassages, as described, for the purpose specified.

8. The combination, substantially as herein described, with the injector-casing and the discharging-cone arranged to slide longitudinally therein, of a lifting-cone having a tubular extension, the axial opening of which is of greater diameter than that of the cone itself, and a combining-cone provided with radial ribs arranged within the extension of the liftingcone, so as to form an overflow-passage between the two cones and an overflow-passage in rear of the combining-cone, in communication with the overflow-passage between said cone and the lifting-eone, through the passages formed by the ribs of the combining-cone, as described, for the purpose specified.

9. The combination, with the injectorcasing A, having steam-inlet, water-overflow, and delivery branches, and the steam-cone G, of a two-part casing detachably connected together and to the casing A, and forming at one end a lifting-cone, G, and having overflow passages and ports 12 p, the combining-cone 0 having ribs 9, and the discharging-cone C arranged to open the overflow-passages 12 1/) under the pressure of an entering jet of steam and close the same under the reactive pressure of the combined jet of steam and water, as described, for the purpose specified.

10. The combination, in an injector, con structed for operation as described, with the end wise movable discharging-cone, of the port p for the purpose specified.

In testimony whereof I affix my signature in the presence of two witnesses.

JAMES GRESHAM.

Witnesses:

PETER J. LIVSEY, JAMES WOOD. 

